diff --git a/lib/datewidget.cpp b/lib/datewidget.cpp
--- a/lib/datewidget.cpp
+++ b/lib/datewidget.cpp
@@ -83,16 +83,16 @@
     d->mPreviousButton = new StatusBarToolButton;
     d->mPreviousButton->setGroupPosition(StatusBarToolButton::GroupLeft);
     // FIXME: RTL
-    d->mPreviousButton->setIcon(SmallIcon("go-previous"));
+    d->mPreviousButton->setIcon(QIcon::fromTheme("go-previous"));
     connect(d->mPreviousButton, &StatusBarToolButton::clicked, this, &DateWidget::goToPrevious);
 
     d->mDateButton = new StatusBarToolButton;
     d->mDateButton->setGroupPosition(StatusBarToolButton::GroupCenter);
     connect(d->mDateButton, &StatusBarToolButton::clicked, this, &DateWidget::showDatePicker);
 
     d->mNextButton = new StatusBarToolButton;
     d->mNextButton->setGroupPosition(StatusBarToolButton::GroupRight);
-    d->mNextButton->setIcon(SmallIcon("go-next"));
+    d->mNextButton->setIcon(QIcon::fromTheme("go-next"));
     connect(d->mNextButton, &StatusBarToolButton::clicked, this, &DateWidget::goToNext);
 
     QHBoxLayout* layout = new QHBoxLayout(this);
diff --git a/lib/thumbnailview/previewitemdelegate.cpp b/lib/thumbnailview/previewitemdelegate.cpp
--- a/lib/thumbnailview/previewitemdelegate.cpp
+++ b/lib/thumbnailview/previewitemdelegate.cpp
@@ -537,7 +537,7 @@
 
     void updateToggleSelectionButton()
     {
-        mToggleSelectionButton->setIcon(SmallIcon(
+        mToggleSelectionButton->setIcon(QIcon::fromTheme(
                                             mView->selectionModel()->isSelected(mIndexUnderCursor) ? "list-remove" : "list-add"
                                         ));
     }
@@ -611,19 +611,19 @@
     d->mContextBar->hide();
 
     d->mToggleSelectionButton = new QToolButton;
-    d->mToggleSelectionButton->setIcon(SmallIcon("list-add"));
+    d->mToggleSelectionButton->setIcon(QIcon::fromTheme("list-add"));
     connect(d->mToggleSelectionButton, &QToolButton::clicked, this, &PreviewItemDelegate::slotToggleSelectionClicked);
 
     d->mFullScreenButton = new QToolButton;
-    d->mFullScreenButton->setIcon(SmallIcon("view-fullscreen"));
+    d->mFullScreenButton->setIcon(QIcon::fromTheme("view-fullscreen"));
     connect(d->mFullScreenButton, &QToolButton::clicked, this, &PreviewItemDelegate::slotFullScreenClicked);
 
     d->mRotateLeftButton = new QToolButton;
-    d->mRotateLeftButton->setIcon(SmallIcon("object-rotate-left"));
+    d->mRotateLeftButton->setIcon(QIcon::fromTheme("object-rotate-left"));
     connect(d->mRotateLeftButton, &QToolButton::clicked, this, &PreviewItemDelegate::slotRotateLeftClicked);
 
     d->mRotateRightButton = new QToolButton;
-    d->mRotateRightButton->setIcon(SmallIcon("object-rotate-right"));
+    d->mRotateRightButton->setIcon(QIcon::fromTheme("object-rotate-right"));
     connect(d->mRotateRightButton, &QToolButton::clicked, this, &PreviewItemDelegate::slotRotateRightClicked);
 
     QHBoxLayout* layout = new QHBoxLayout(d->mContextBar);
@@ -636,7 +636,7 @@
 
     // Save button
     d->mSaveButton = new QToolButton(d->mView->viewport());
-    d->mSaveButton->setIcon(SmallIcon("document-save"));
+    d->mSaveButton->setIcon(QIcon::fromTheme("document-save"));
     d->mSaveButton->hide();
     connect(d->mSaveButton, &QToolButton::clicked, this, &PreviewItemDelegate::slotSaveClicked);
 }
diff --git a/lib/thumbnailview/thumbnailbarview.cpp b/lib/thumbnailview/thumbnailbarview.cpp
--- a/lib/thumbnailview/thumbnailbarview.cpp
+++ b/lib/thumbnailview/thumbnailbarview.cpp
@@ -81,7 +81,7 @@
     void setupToggleSelectionButton()
     {
         mToggleSelectionButton = new QToolButton(mView->viewport());
-        mToggleSelectionButton->setIcon(SmallIcon("list-add"));
+        mToggleSelectionButton->setIcon(QIcon::fromTheme("list-add"));
         mToggleSelectionButton->hide();
         QObject::connect(mToggleSelectionButton, &QToolButton::clicked, q, &ThumbnailBarItemDelegate::toggleSelection);
     }
@@ -140,7 +140,7 @@
     void updateToggleSelectionButton()
     {
         bool isSelected = mView->selectionModel()->isSelected(mIndexUnderCursor);
-        mToggleSelectionButton->setIcon(SmallIcon(isSelected ? "list-remove" : "list-add"));
+        mToggleSelectionButton->setIcon(QIcon::fromTheme(isSelected ? "list-remove" : "list-add"));
     }
 };